Christmas tree ornament



FIG. 1 is a front elevational view of a Christmas tree ornament showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front perspective view thereof; and

FIG. 6 is a right side elevational view thereof, the left side being a mirror image. 

The ornamental design for a Christmas tree ornament, as shown and described. 